PROTECTION, AUTOMATION & CONTROL
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1 PROTECTION, AUTOMATION & CONTROL
2
3 1. DTIVA The members of the DTIVA product line are configured to protect and control the elements of not solidly grounded radial networks. Here the application of Petersen coils or grounding resistances results relatively low currents in case of single phase-to-ground faults. The majority of the protections are based on current measurements only, but the application of distributed generation or loops in the network topology requires additional voltage measurement and directional protection functions. 1.1 Selection guide to DTIVA configurations Version E1 E2 Recommended application Protection of overhead lines and cables on radial networks. The configured functions are based on current measurement and they are supplemented with automatic reclosing function. This configuration is the functional extension of version DTIVA E1. The additional voltage measurement is the basis of the residual directional decision, power calculation and over- and undervoltage functions. E3 The configuration is designed to meet the requirements of a complex field unit for overhead lines and cables on compensated or resistance grounded networks. The range of functions includes all current and voltage based applications, except distance protection and line differential functions. The automatic reclosing function is performed with synchro-check. Frequency protection functions are included. E4 This configuration is the functional extension of version DTIVA E3. The range of functions includes all current and voltage based applications, including the distance protection function. The only exception is the line differential function. E5 This configuration is another functional extension of version DTIVA E3. The range of functions includes all current and voltage based applications except for the distance protection function. The configuration is supplemented with the line differential protection function. E6 This configuration is a functional extension of version DTIVA E3. The range of functions includes all current and voltage based applications, including the distance protection function and line differential protection function. E7 The configuration is designed to meet the requirements of a complex motor protection device for medium voltage motors. E8 The configuration is designed to measure voltages. Over- and undervoltage functions are performed based on these measurements. The configuration is supplemented with frequency protection functions. E9 The configuration is designed to be applied on networks with distributed generation. Its unique function is vector jump protection. Additionally to voltage-based functions, current-base functions are also available, and the measurements support the application of calculated power-based functions. All configurations include event logging and disturbance recorder, on-line measurements and various communication protocols. E10 This simple configuration is designed to protect power capacitor units, based on current unbalance measurement. 3
4 1.2 Configurations Configurations E1 E2 E3 E4 E5 E6 E7 E71 E8 E9 E Functions Three-phase instantaneous overcurrent protection (50) Three-phase time overcurrent protection (51) Three-phase directional overcurrent protection (67) Residual instantaneous overcurrent protection (50N) Residual time overcurrent protection (51N) Residual directional overcurrent protection (67N) Line differential (87L) Distance protection (21) Inrush detection and blocking (68) Negative sequence overcurrent protection (46) Thermal protection (49) Definite time overvoltage protection (59) Definite time undervoltage protection (27) Residual overvoltage protection (59N) Negative sequence overvoltage protection (47) Positive sequence undervoltage protection (27D) Overfrequency protection (81O) Underfrequency protection (81U) Rate of change of frequency protection (81R) Synchrocheck (25) Auto-reclose (79) Fuse failure (VTS) (60) Current unbalance protection (60) Breaker failure protection (50BF) Motor startup supervision (48) Undercurrent protection (37) Starts per hour (66) Directional overpower (32) Directional underpower (32) 1.4 Measured values Current (I1, I2, I3, Io) Voltage (U1, U2, U3, U12, U23, U31, Uo, Useq) and frequency Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-) Circuit breaker wear Supervised trip contacts (TCS) 4
5 2. DTRV The members of the DTRV product line are configured to protect and control power transformers. 2.1 Selection guide to DTRV configurations Version Recommended application E1 The DTRV E1 configuration measures three phase currents and the zero sequence current component from both sides of a two-winding, three-phase transformer. The main protection functions are transformer differential protection and restricted earth-fault protection functions. A thermal replica protection function is also included. E2 This configuration is the functional extension of version DTRV E1. Additionally, it measures three phase voltages and the zero sequence voltage component. These measurements allow, in addition to the current- and voltage-based functions, directionality extension of the residual overcurrent function. Based on the voltage measurement, the frequency is also evaluated to realize frequency-based protection functions. E3 This configuration is the functional extension of version DTRV E3. The device also implements a tapchanger controller function. E4 This configuration is identical with the DTRV E1 and it can be applied to three-winding, three-phase transformers. E5 This configuration is identical with the DTRV E2 and it can be applied to three-winding, three-phase transformers. E6 This configuration is identical with the DTRV E3 and it can be applied to three-winding, three-phase transformers. E7 This configuration is the functional extension of version DTRV E3. The tap-changer controller function also considers the voltage drop of serial network elements and the healthy state of the high voltage supply network. Voltage limitation functions are also included. Option to control parallel transformers is also available. E8 This configuration is the functional extension of version DTRV E2. The main protection function in this application is the distance protection function. All configurations include event logging and disturbance recorder, on-line measurements and various communication protocols. E9 The DTRV E9 configuration is designed to protect generators in the 2.5 MVA to 50 MVA power range. The device includes all generator protection functions that are based on voltage and current measurement. Only protection functions requiring additional high voltage elements, such as injectors, are excluded from the range of functions. 5
6 2.2 Configurations Configurations E1 E2 E3 E4 E5 E6 E7 E8 E9 2.3 Functions Three-phase instantaneous overcurrent protection (50) Three-phase time overcurrent protection (51) Residual instantaneous overcurrent protection (50N) Residual time overcurrent protection (51N) Residual directional overcurrent protection (67N) Generator differential protection (87G) Impedance protection (21) Out-of-step (78) Negative sequence overcurrent protection (46) Thermal protection (49) Transformer differential (87T) Restricted earth fault (87N) Definite time overvoltage protection (59) Definite time undervoltage protection (27) Residual overvoltage protection (59N) Negative sequence overvoltage protection (47) Overfrequency protection (81O) Underfrequency protection (81U) Rate of change of frequency protection (81R) Overexcitation (24) Loss of excitation (40) Synchrocheck (25) Fuse failure (VTS) (60) Current unbalance protection (60) Breaker failure protection (50BF) Directional overpower (32) Directional underpower (32) 2.4 Measured values Current (I1, I2, I3, Io) Voltage (U1, U2, U3, U12, U23, U31, Uo, Useq) and frequency Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-) Supervised trip contacts (TCS) 6
7 3. DTVA The members of the DTVA product line are configured to protect and control the elements of solidly grounded networks. In these networks single phase-toground faults result high current, similar to line-to-line faults; therefore, both types of fault need fast protection functions. 3.1 Selection guide to DTVA configurations Version E1 Recommended application The DTVA E1 configuration measures three phase currents, the zero sequence current component of the parallel line and, additionally, three phase voltages and the busbar voltage. These measurements allow, in addition to the current- and voltage-based functions, directionality extension of the configured phase and residual overcurrent function and also directional overpower or underpower functions. The main protection function in this application is the distance protection function. The distance protection function can generate three-phase or singlephase trip commands, depending on the fault types and the requirements. The range of functions is supplemented with the automatic reclosing function, synchrocheck, power swing detection and switchonto-fault logic. Based on the voltage measurement, the frequency is also evaluated to realize frequency-based protection functions. E2 This version is a functional extension of DTVA E1: There are two main protection functions in this application: the distance protection function and the line differential protection function. The communication hardware module sends and receives phase current vectors to realize the line differential protection function. The range of functions is supplemented with a directional phase overcurrent protection function. All configurations include event logging and disturbance recorder, on-line measurements and various communication protocols 7
8 3.2 Configurations Configurations E1 E2 3.3 Functions Three-phase instantaneous overcurrent protection (50) Three-phase time overcurrent protection (51) Three-phase directional overcurrent protection (67) Residual instantaneous overcurrent protection (50N) Residual time overcurrent protection (51N) Residual directional overcurrent protection (67N) Line differential (87L) Distance protection (21) Out-of-step (78) Switch onto fault logic Power swing block (68) Inrush detection and blocking (68) Negative sequence overcurrent protection (46) Thermal protection (49) Definite time overvoltage protection (59) Definite time undervoltage protection (27) Residual overvoltage protection ((59N) Negative sequence overvoltage protection (47) Overfrequency protection (81O) Underfrequency protection (81U) Rate of change of frequency protection (81R) Synchrocheck (25) Auto-reclose (79) Fuse failure (VTS) (60) Current unbalance protection (60) Breaker failure protection (50BF) Directional overpower (32) Directional underpower (32) 3.4 Measured values Current (I1, I2, I3, Io) Voltage (U1, U2, U3, U12, U23, U31, Uo, Useq) and frequency Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-) Circuit breaker wear Supervised trip contacts (TCS) 8
9 4. DHMBR 1 Introduction The DHMBR configuration collects all functions related to the circuit breakers of the high voltage network. 4.2 Configuration Configurations E1 4.3 Functions Three-phase time overcurrent protection (51) Residual time overcurrent protection (51N) Definite time overvoltage protection (59) Definite time undervoltage protection (27) Residual overvoltage protection (59N) Synchrocheck (25) Auto-reclose (79) Fuse failure (VTS) (60) Breaker failure protection (50BF) 4.4 Measured values 4.1 DHMBR E1 configuration Current (I1, I2, I3, Io) Voltage (U1, U2, U3, U12, U23, U31, Uo, Useq) and frequency Power (P, Q, S, pf) and Energy (E+, E-, Eq+, Eq-) Circuit breaker wear Supervised trip contacts (TCS) Version E1 Recommended application The DHMBR E1 configuration measures three phase currents, the zero sequence current component and additionally three phase voltages and the busbar voltage. It can be applied if individual automatic reclosing function with synchro-check and circuit breaker failure protection function is to be applied with external starting signals. The simple voltage- and current-based protection functions are intended to support the main functions. The configuration includes event logging and disturbance recorder, on-line measurements and various communication protocols. 9
10 5. DGYD 5.1 Selection guide to DGYD configurations Version E11 E31 E32 E33 E34 E35 Recommended application In this version the configuration consists of three identical devices, processing the phase currents separately for the phases. To be applied for max. 12 bays, max 4 busbar sections. In this version the configuration measures three phase currents in max 3 bays, of 1 busbar section. In this version the configuration measures three phase currents in max 4 bays of 1 busbar section. In this version the configuration measures three phase currents in max 5 bays of 1 busbar section. In this version the configuration measures three phase currents in max 6 bays of 1 busbar section. In this version the configuration measures three phase currents of max 6 bays in up to 2 busbar sections. 5.2 Configuration Configurations E11 E31 E32 E33 E34 E Functions Busbar differential (87B) Breaker failure protection (50BF) 5.4 Measured values Current (I1, I2, I3, Io) Voltage (U1, U2, U3, U12, U23, U31, Uo, Useq) and frequency Supervised trip contacts (TCS) The centralized numerical busbar differential protection system has two configuration options: It can be implemented in one device, processing all three phase currents of all bays, or It can consist of three identical devices processing the phase currents separately for the phases. The main features of the busbar differential protection: The function is performed within one device, receiving analog current, voltage and status signals from all bays of the busbar; Dynamic busbar replica, based on disconnector status signals; High stability in case of external faults in spite of current transformer saturation; Short tripping time; Selectivity for internal fault, only the bays connected to the faulty busbar section are disconnected, all other bays remain in continuous operation; Easily to extend within the limitation of the hardware of three-phase or three single phase hardware versions; Easy adaptation of the function for different primary bus systems: o Single busbar, o Up to quadruple busbar, o Ring bus, o 1 ½ circuit breaker arrangement, o Bus couplers, o Bus sectionalizers with one or two current transformers, o Transfer bus; Individual numerical calculation and decision for all three phases; Stabilized differential current characteristics; Security and stability are increased through special software features; Voltage breakdown condition, Check zone application, Saturated waveform compensation, Directionality check, Current transformer failure detection, Checking the disconnector status signals, Built-in breaker failure protection. Individual configurations consist of different numbers of analog and binary input elements, determined by the maximum size of the bus structure to be protected. 10 All configurations include event logging and disturbance recorder, on-line measurements and various communication protocols.
11 6. OGYD Distributed numerical busbar differential protection: In this version other independent protective devices of the bays (distance protection, overcurrent protection, etc.) are involved in the busbar protection scheme. Their location in the substation depends on the bay structure of the primary system. These devices perform the sampling of the currents and they have access to all information needed for the busbar protection system. This information is sent by a fiber optic link to the central unit. The calculation and decision is performed by the central unit and the dedicated trip commands are sent back to the bay devices also via fiber optic links. Main features: The function is performed within one central device, but the analog currents and status signals from all bays of the busbar are accessed by protection devices dedicated to the bay; The bay units can perform any other protection function but they exchange information with the central device via fiber optic links; Dynamic busbar replica, based on disconnector status signals; High stability in case of external faults in spite of current transformer saturation; Short tripping time; Selectivity for internal fault, only the bays connected to the faulty busbar section are disconnected, all other bays remain in continuous operation; Easy to extend according to the busbar configuration; Easy adaptation of the function for different primary bus systems: o Single busbar, o Up to quadruple busbar, o Ring bus, o 1 ½ circuit breaker arrangement, o Bus couplers, o Bus sectionalizers with one or two current transformers, Transfer bus; Individual numerical calculation and decision for all three phases; Stabilized differential current characteristics; The security and stability are increased with special software methods; Voltage breakdown condition, Check zone application, Saturated waveform compensation, Directionality check, Current transformer failure detection, Checking the disconnector status signals, Built-in breaker failure protection. The central unit is responsible for the organization of the busbar protection system; also, the numerical calculations and decisions are performed in this module. Based on the disconnector status information received from the bay units, so called Measuring elements are composed. A Measuring element processes all currents that flow into or out of the interconnected bus sections. The trip commands are passed to the circuit breakers via the protection device dedicated to the bays. For the configuration, parameter values are needed in the central device; these parameter values are to be set in the central device for the bays individually. The bay units are the interface between the power technology (measuring transformers, disconnector status signals, circuit breaker trip commands) and the busbar protection function in the central device. These units sample the assigned phase currents and voltages, and send them, together with the status information to the central device via fiber optic network. 6.1 Configuration Configurations 6.2 Functions OGYD Busbar differential (87B) Breaker failure protection (50BF) 6.3 Measured values Current (I1, I2, I3, Io) Voltage (U1, U2, U3, U12, U23, U31, Uo, Useq) and frequency Supervised trip contacts (TCS) In the distributed version, the functionality of the busbar differential protection function is performed in co-operation of one central unit and of several bay units. 11
12 12 Tartalom
TWO-WINDING TRANSFORMER DIFFERENTIAL
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